交流變頻調速系統電機端過電壓量化分析及抑制方法.pdf

1、廣西大學碩士學位論文交流變頻調速系統電機端過電壓量化分析及抑制方法姓名：文磊申請學位級別：碩士專業(yè)：檢測技術裝置及自動化指導教師：陸益民20090626QUANTIFICATIONANALYSISOFoVER—VoLTAGECAUSEDBYINVERTERANDSUPPRESSl0NMETHoDSINAPPLICATIoNABSTRACTWiththedevelopmentofpowerelectronicstechnology，esp

2、eciallytheemergenceoflargescaleintegratedcircuits，leadstotheadvancementofhighpowerswitchtechnologyandfurtherledtothedevelopmentofinvertertechnologyInverterscangreatlysaveenergy，improvehumanlivingenvironment，lowerproducti

3、oncosts，improveproductsquality，andheightenindustryautomationTherefore，invertersareusedinmodernindustrymorewidelyNow，almostallinvertersusePWMcontroltechnologiesItcanimprovetheinverteroutputwaveforms，reducemotorharmoniclos

4、sandimprovesystemdynamicperformanceButitsfastrisetimeandgreatmanyharmonicledtotheovervoltageatthemotorterminalcausedbyPWMinverterfedmotordrivesItalsocandestroyinsulatingprotectivelayerofmotorandincreaseseriouslyaffectsth

5、euseofconverterFirstly，thistextusethetransmissiontheorytoexplainovervoltageappearinmotorterminal，whenmotorfedbyinverterwithlonglabelFromthemathematicalmodelitcanbefoundthatthetimedomainanalyticalofovervoltageatthemotorte

6、rminalandtherelationofPWMpulserisetimeandlengthoflabelSecondly，InordertoeliminatetheovervoltagetwokindsofLRCfilterwhichareinstalledatPWMinverterisanalyzedanddesignedBychangingthefilterparametervalues，itcanbecometodv／dtsu

7、ppressionfilterorsine—wavefilterTheformerappliestothedesignparametersofacertainlengthofcable，thecostisrelativelylow，andthedesignofthelatterhasnothingtodowiththecablelength，basedonthefilterteducethewearandtear，thecostiSre